Asmall bar of gold is a rectangular prism that measures 40 mm. by 25 mm. by 2 mm. one cubic mm. of gold weights about 0.0005 ounces. find the volume in cubic mm. and the weight in ounces of this small bar of gold.

Volume = length times width times height
Volume = 40 mm times 25 mm times 2mm
Volume = 2000 cubic mm (If you want to write it in a different unit, 2 cubic meters)
One cubic mm = 0.0005 ounces
2000 cubic mm = weight of one cubic mm times 2000
2000 cubic mm = 0.0005 times 2000
2000 cubic mm weighs 1 ounce